NV_vdpau_interop: fix IsSurfaceNV return type

The spec incorrectly used void as return type, when it should have
been GLboolean. This has now been fixed. According to Nvidia, their
implementation always used GLboolean.

Reviewed-by: Christian König <christian.koenig@amd.com>

include/GL/glext.h

@@ -9658,7 +9658,7 @@ GLAPI void APIENTRY glVDPAUInitNV (const void *vdpDevice, const void *getProcAdd
 GLAPI void APIENTRY glVDPAUFiniNV (void);
 GLAPI GLvdpauSurfaceNV APIENTRY glVDPAURegisterVideoSurfaceNV (const void *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
 GLAPI GLvdpauSurfaceNV APIENTRY glVDPAURegisterOutputSurfaceNV (const void *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
-GLAPI void APIENTRY glVDPAUIsSurfaceNV (GLvdpauSurfaceNV surface);
+GLAPI GLboolean APIENTRY glVDPAUIsSurfaceNV (GLvdpauSurfaceNV surface);
 GLAPI void APIENTRY glVDPAUUnregisterSurfaceNV (GLvdpauSurfaceNV surface);
 GLAPI void APIENTRY glVDPAUGetSurfaceivNV (GLvdpauSurfaceNV surface, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
 GLAPI void APIENTRY glVDPAUSurfaceAccessNV (GLvdpauSurfaceNV surface, GLenum access);

src/mapi/glapi/gen/NV_vdpau_interop.xml

@@ -29,6 +29,7 @@
     </function>
 
     <function name="VDPAUIsSurfaceNV" offset="assign">
+        <return type="GLboolean"/>
 	<param name="surface" type="GLintptr"/>
     </function>
 

src/mesa/main/vdpau.c

@@ -205,7 +205,7 @@ _mesa_VDPAURegisterOutputSurfaceNV(const GLvoid *vdpSurface, GLenum target,
                            numTextureNames, textureNames);
 }
 
-void GLAPIENTRY
+GLboolean GLAPIENTRY
 _mesa_VDPAUIsSurfaceNV(GLintptr surface)
 {
    struct vdp_surface *surf = (struct vdp_surface *)surface;
@@ -213,13 +213,14 @@ _mesa_VDPAUIsSurfaceNV(GLintptr surface)
 
    if (!ctx->vdpDevice || !ctx->vdpGetProcAddress || !ctx->vdpSurfaces) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "VDPAUIsSurfaceNV");
-      return;
+      return false;
    }
 
    if (!_mesa_set_search(ctx->vdpSurfaces, _mesa_hash_pointer(surf), surf)) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "VDPAUIsSurfaceNV");
-      return;
+      return false;
    }
+
+   return true;
 }
 
 void GLAPIENTRY

src/mesa/main/vdpau.h

@@ -50,7 +50,7 @@ _mesa_VDPAURegisterOutputSurfaceNV(const GLvoid *vdpSurface, GLenum target,
                                    GLsizei numTextureNames,
                                    const GLuint *textureNames);
 
-extern void GLAPIENTRY
+extern GLboolean GLAPIENTRY
 _mesa_VDPAUIsSurfaceNV(GLintptr surface);
 
 extern void GLAPIENTRY